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1.5L REVOTORQ ENGINE
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4. Check the continuity from sensor connector
pins to the ECU pins.
5. Check for Sensor poisoning /
CONNECTOR DETAIL
PINOUT DETAILS
PIN
DESCRIPTION
1
Heater (+)
2
Heater (-)
3
Inner Pumping Electrode (-)
4
Air Electrode (+)
COMPONENT SPECIFICATION
The lambda sensor is mounted on the closed
couple catcon. The lambda sensor has a four pin
connector with a special ceramic body and gas
permeable platinum electrodes on the surface.
When the ceramic body is exposed to
temperature 350 °C, oxygen in the air diffuses into
ceramic body. Depending on the porosity
electrodes which are exposed to gas having
varied level of oxygen. The lambda sensor
provides air/fuel ratio signal in mili volts to ECU as
a function of varying air/fuel ratio.
At 350 °C,
Lambda = 0.97 - 800 mV ± 55 mV(Rich mixture)
Lambda = 1.1 - 50 mV ± 30 mV (Lean mixture)
SENSOR STANDALONE DIAGNOSIS
Use TATA diagnosis tool to check for :
Signal voltage - > than 0.5V or < than 0.4V
Switching frequency - > than 0.2 Hz
Use multi-meter to check the heater function by
measuring the heater resistance.
Heater resistance at room temperature – 90 ohms
Supply voltage – 12V DC
Check the signal voltage (Between pin number 2
and 3)
Signal Voltage - 0.68 ± 0.25V DC- at idle position
Signal Voltage - 04.25 ± 0.45V DC – at WOT
position
xix. DPF TEMPERATURE SENSOR
SENSOR LOCATION
CONNECTOR DETAIL
a) On DPF
PIN
DESCRIPTION
1
(+) Signal, Grey
2
(-) Ground, White